Commit | Line | Data |
---|---|---|
059ec3d9 PH |
1 | /************************************************* |
2 | * Exim - an Internet mail transport agent * | |
3 | *************************************************/ | |
4 | ||
f9ba5e22 | 5 | /* Copyright (c) University of Cambridge 1995 - 2018 */ |
059ec3d9 PH |
6 | /* See the file NOTICE for conditions of use and distribution. */ |
7 | ||
8 | /* Functions for sending messages to sender or to mailmaster. */ | |
9 | ||
10 | ||
11 | #include "exim.h" | |
12 | ||
13 | ||
14 | ||
0e22dfd1 PH |
15 | /************************************************* |
16 | * Write From: line for DSN * | |
17 | *************************************************/ | |
18 | ||
19 | /* This function is called to write the From: line in automatically generated | |
20 | messages - bounces, warnings, etc. It expands a configuration item in order to | |
21 | get the text. If the expansion fails, a panic is logged and the default value | |
22 | for the option is used. | |
23 | ||
24 | Argument: the FILE to write to | |
25 | Returns: nothing | |
26 | */ | |
27 | ||
28 | void | |
29 | moan_write_from(FILE *f) | |
30 | { | |
d6c829b9 | 31 | uschar * s = expand_string(dsn_from); |
5455f548 | 32 | if (!s) |
0e22dfd1 PH |
33 | { |
34 | log_write(0, LOG_MAIN|LOG_PANIC, | |
35 | "Failed to expand dsn_from (using default): %s", expand_string_message); | |
36 | s = expand_string(US DEFAULT_DSN_FROM); | |
37 | } | |
38 | fprintf(f, "From: %s\n", s); | |
39 | } | |
40 | ||
41 | ||
42 | ||
d6c829b9 JH |
43 | /************************************************* |
44 | * Write References: line for DSN * | |
45 | *************************************************/ | |
46 | ||
47 | /* Generate a References: header if there is in the header_list | |
48 | at least one of Message-ID:, References:, or In-Reply-To: (see RFC 2822). | |
49 | ||
50 | Arguments: f the FILE to write to | |
51 | message_id optional already-found message-id, or NULL | |
52 | ||
53 | Returns: nothing | |
54 | */ | |
55 | ||
56 | void | |
57 | moan_write_references(FILE * fp, uschar * message_id) | |
58 | { | |
59 | header_line * h; | |
60 | ||
61 | if (!message_id) | |
62 | for (h = header_list; h; h = h->next) | |
63 | if (h->type == htype_id) | |
64 | { | |
65 | message_id = Ustrchr(h->text, ':') + 1; | |
66 | while (isspace(*message_id)) message_id++; | |
67 | } | |
68 | ||
69 | for (h = header_list; h; h = h->next) | |
70 | if (h->type != htype_old && strncmpic(US"References:", h->text, 11) == 0) | |
71 | break; | |
72 | ||
73 | if (!h) | |
74 | for (h = header_list; h; h = h->next) | |
75 | if (h->type != htype_old && strncmpic(US"In-Reply-To:", h->text, 12) == 0) | |
76 | break; | |
77 | ||
78 | /* We limit the total length of references. Although there is no fixed | |
79 | limit, some systems do not like headers growing beyond recognition. | |
80 | Keep the first message ID for the thread root and the last few for | |
81 | the position inside the thread, up to a maximum of 12 altogether. */ | |
82 | ||
83 | if (h || message_id) | |
84 | { | |
85 | fprintf(fp, "References:"); | |
86 | if (h) | |
87 | { | |
88 | uschar * s, * id, * error; | |
89 | uschar * referenced_ids[12]; | |
90 | int reference_count = 0; | |
91 | ||
92 | s = Ustrchr(h->text, ':') + 1; | |
93 | f.parse_allow_group = FALSE; | |
94 | while (*s && (s = parse_message_id(s, &id, &error))) | |
95 | if (reference_count == nelem(referenced_ids)) | |
96 | { | |
97 | memmove(referenced_ids + 1, referenced_ids + 2, | |
98 | sizeof(referenced_ids) - 2*sizeof(uschar *)); | |
99 | referenced_ids[reference_count - 1] = id; | |
100 | } | |
101 | else | |
102 | referenced_ids[reference_count++] = id; | |
103 | ||
104 | for (int i = 0; i < reference_count; ++i) | |
105 | fprintf(fp, " %s", referenced_ids[i]); | |
106 | } | |
107 | ||
108 | /* The message id will have a newline on the end of it. */ | |
109 | ||
110 | if (message_id) fprintf(fp, " %s", message_id); | |
111 | else fprintf(fp, "\n"); | |
112 | } | |
113 | } | |
114 | ||
115 | ||
116 | ||
059ec3d9 PH |
117 | /************************************************* |
118 | * Send error message * | |
119 | *************************************************/ | |
120 | ||
121 | /* This function sends an error message by opening a pipe to a new process | |
122 | running Exim, and writing a message to it using the "-t" option. This is not | |
123 | used for delivery failures, which have their own code for handing failed | |
124 | addresses. | |
125 | ||
126 | Arguments: | |
127 | recipient addressee for the message | |
128 | ident identifies the type of error | |
129 | eblock chain of error_blocks containing data about the error | |
130 | headers the message's headers | |
131 | message_file FILE containing the body of the message | |
132 | firstline contains first line of file, if it was read to check for | |
133 | "From ", but it turned out not to be | |
134 | ||
135 | Returns: TRUE if message successfully sent | |
136 | */ | |
137 | ||
5455f548 | 138 | BOOL |
059ec3d9 PH |
139 | moan_send_message(uschar *recipient, int ident, error_block *eblock, |
140 | header_line *headers, FILE *message_file, uschar *firstline) | |
141 | { | |
142 | int written = 0; | |
143 | int fd; | |
144 | int status; | |
145 | int count = 0; | |
146 | int size_limit = bounce_return_size_limit; | |
8768d548 | 147 | FILE * fp; |
5455f548 | 148 | int pid; |
059ec3d9 | 149 | |
1a2e76e1 | 150 | #ifdef SUPPORT_DMARC |
5455f548 JH |
151 | uschar * s, * s2; |
152 | ||
153 | /* For DMARC if there is a specific sender set, expand the variable for the | |
154 | header From: and grab the address from that for the envelope FROM. */ | |
155 | ||
156 | if ( ident == ERRMESS_DMARC_FORENSIC | |
157 | && dmarc_forensic_sender | |
158 | && (s = expand_string(dmarc_forensic_sender)) | |
159 | && *s | |
160 | && (s2 = expand_string(string_sprintf("${address:%s}", s))) | |
161 | && *s2 | |
162 | ) | |
8e9fdd63 JH |
163 | pid = child_open_exim2(&fd, s2, bounce_sender_authentication, |
164 | US"moan_send_message"); | |
5455f548 JH |
165 | else |
166 | { | |
167 | s = NULL; | |
8e9fdd63 | 168 | pid = child_open_exim(&fd, US"moan_send_message"); |
5455f548 JH |
169 | } |
170 | ||
171 | #else | |
8e9fdd63 | 172 | pid = child_open_exim(&fd, US"moan_send_message"); |
5455f548 | 173 | #endif |
059ec3d9 PH |
174 | |
175 | if (pid < 0) | |
176 | { | |
177 | DEBUG(D_any) debug_printf("Failed to create child to send message: %s\n", | |
178 | strerror(errno)); | |
179 | return FALSE; | |
180 | } | |
181 | else DEBUG(D_any) debug_printf("Child process %d for sending message\n", pid); | |
182 | ||
183 | /* Creation of child succeeded */ | |
184 | ||
8768d548 JH |
185 | fp = fdopen(fd, "wb"); |
186 | if (errors_reply_to) fprintf(fp, "Reply-To: %s\n", errors_reply_to); | |
187 | fprintf(fp, "Auto-Submitted: auto-replied\n"); | |
5455f548 | 188 | |
1a2e76e1 | 189 | #ifdef SUPPORT_DMARC |
5455f548 JH |
190 | if (s) |
191 | fprintf(fp, "From: %s\n", s); | |
192 | else | |
193 | #endif | |
194 | moan_write_from(fp); | |
195 | ||
8768d548 | 196 | fprintf(fp, "To: %s\n", recipient); |
d6c829b9 | 197 | moan_write_references(fp, NULL); |
059ec3d9 PH |
198 | |
199 | switch(ident) | |
200 | { | |
201 | case ERRMESS_BADARGADDRESS: | |
8768d548 | 202 | fprintf(fp, |
62b7cd08 | 203 | "Subject: Mail failure - malformed recipient address\n\n"); |
8768d548 | 204 | fprintf(fp, |
62b7cd08 JH |
205 | "A message that you sent contained a recipient address that was incorrectly\n" |
206 | "constructed:\n\n"); | |
8768d548 | 207 | fprintf(fp, " %s %s\n", eblock->text1, eblock->text2); |
62b7cd08 JH |
208 | count = Ustrlen(eblock->text1); |
209 | if (count > 0 && eblock->text1[count-1] == '.') | |
8768d548 | 210 | fprintf(fp, |
62b7cd08 | 211 | "\nRecipient addresses must not end with a '.' character.\n"); |
8768d548 | 212 | fprintf(fp, |
62b7cd08 JH |
213 | "\nThe message has not been delivered to any recipients.\n"); |
214 | break; | |
059ec3d9 PH |
215 | |
216 | case ERRMESS_BADNOADDRESS: | |
217 | case ERRMESS_BADADDRESS: | |
8768d548 | 218 | fprintf(fp, |
62b7cd08 | 219 | "Subject: Mail failure - malformed recipient address\n\n"); |
8768d548 | 220 | fprintf(fp, |
62b7cd08 JH |
221 | "A message that you sent contained one or more recipient addresses that were\n" |
222 | "incorrectly constructed:\n\n"); | |
059ec3d9 | 223 | |
d6c829b9 | 224 | while (eblock) |
62b7cd08 | 225 | { |
8768d548 | 226 | fprintf(fp, " %s: %s\n", eblock->text1, eblock->text2); |
62b7cd08 JH |
227 | count++; |
228 | eblock = eblock->next; | |
229 | } | |
059ec3d9 | 230 | |
8768d548 | 231 | fprintf(fp, (count == 1)? "\nThis address has been ignored. " : |
62b7cd08 | 232 | "\nThese addresses have been ignored. "); |
059ec3d9 | 233 | |
8768d548 | 234 | fprintf(fp, (ident == ERRMESS_BADADDRESS)? |
62b7cd08 JH |
235 | "The other addresses in the message were\n" |
236 | "syntactically valid and have been passed on for an attempt at delivery.\n" : | |
059ec3d9 | 237 | |
62b7cd08 JH |
238 | "There were no other addresses in your\n" |
239 | "message, and so no attempt at delivery was possible.\n"); | |
240 | break; | |
059ec3d9 PH |
241 | |
242 | case ERRMESS_IGADDRESS: | |
8768d548 JH |
243 | fprintf(fp, "Subject: Mail failure - no recipient addresses\n\n"); |
244 | fprintf(fp, | |
62b7cd08 JH |
245 | "A message that you sent using the -t command line option contained no\n" |
246 | "addresses that were not also on the command line, and were therefore\n" | |
247 | "suppressed. This left no recipient addresses, and so no delivery could\n" | |
248 | "be attempted.\n"); | |
249 | break; | |
059ec3d9 PH |
250 | |
251 | case ERRMESS_NOADDRESS: | |
8768d548 JH |
252 | fprintf(fp, "Subject: Mail failure - no recipient addresses\n\n"); |
253 | fprintf(fp, | |
62b7cd08 JH |
254 | "A message that you sent contained no recipient addresses, and therefore no\n" |
255 | "delivery could be attempted.\n"); | |
256 | break; | |
059ec3d9 PH |
257 | |
258 | case ERRMESS_IOERR: | |
8768d548 JH |
259 | fprintf(fp, "Subject: Mail failure - system failure\n\n"); |
260 | fprintf(fp, | |
62b7cd08 JH |
261 | "A system failure was encountered while processing a message that you sent,\n" |
262 | "so it has not been possible to deliver it. The error was:\n\n%s\n", | |
263 | eblock->text1); | |
264 | break; | |
059ec3d9 PH |
265 | |
266 | case ERRMESS_VLONGHEADER: | |
8768d548 JH |
267 | fprintf(fp, "Subject: Mail failure - overlong header section\n\n"); |
268 | fprintf(fp, | |
62b7cd08 JH |
269 | "A message that you sent contained a header section that was excessively\n" |
270 | "long and could not be handled by the mail transmission software. The\n" | |
271 | "message has not been delivered to any recipients.\n"); | |
272 | break; | |
059ec3d9 PH |
273 | |
274 | case ERRMESS_VLONGHDRLINE: | |
8768d548 JH |
275 | fprintf(fp, "Subject: Mail failure - overlong header line\n\n"); |
276 | fprintf(fp, | |
62b7cd08 JH |
277 | "A message that you sent contained a header line that was excessively\n" |
278 | "long and could not be handled by the mail transmission software. The\n" | |
279 | "message has not been delivered to any recipients.\n"); | |
280 | break; | |
059ec3d9 PH |
281 | |
282 | case ERRMESS_TOOBIG: | |
8768d548 JH |
283 | fprintf(fp, "Subject: Mail failure - message too big\n\n"); |
284 | fprintf(fp, | |
62b7cd08 JH |
285 | "A message that you sent was longer than the maximum size allowed on this\n" |
286 | "system. It was not delivered to any recipients.\n"); | |
287 | break; | |
059ec3d9 PH |
288 | |
289 | case ERRMESS_TOOMANYRECIP: | |
8768d548 JH |
290 | fprintf(fp, "Subject: Mail failure - too many recipients\n\n"); |
291 | fprintf(fp, | |
62b7cd08 JH |
292 | "A message that you sent contained more recipients than allowed on this\n" |
293 | "system. It was not delivered to any recipients.\n"); | |
294 | break; | |
059ec3d9 PH |
295 | |
296 | case ERRMESS_LOCAL_SCAN: | |
297 | case ERRMESS_LOCAL_ACL: | |
8768d548 JH |
298 | fprintf(fp, "Subject: Mail failure - rejected by local scanning code\n\n"); |
299 | fprintf(fp, | |
62b7cd08 JH |
300 | "A message that you sent was rejected by the local scanning code that\n" |
301 | "checks incoming messages on this system."); | |
302 | if (eblock->text1) | |
8768d548 JH |
303 | fprintf(fp, " The following error was given:\n\n %s", eblock->text1); |
304 | fprintf(fp, "\n"); | |
059ec3d9 PH |
305 | break; |
306 | ||
1a2e76e1 | 307 | #ifdef SUPPORT_DMARC |
4840604e | 308 | case ERRMESS_DMARC_FORENSIC: |
62b7cd08 JH |
309 | bounce_return_message = TRUE; |
310 | bounce_return_body = FALSE; | |
5455f548 JH |
311 | fprintf(fp, "Subject: DMARC Forensic Report for %s from IP %s\n\n", |
312 | eblock ? eblock->text2 : US"Unknown", | |
4840604e | 313 | sender_host_address); |
8768d548 | 314 | fprintf(fp, |
62b7cd08 JH |
315 | "A message claiming to be from you has failed the published DMARC\n" |
316 | "policy for your domain.\n\n"); | |
5455f548 | 317 | while (eblock) |
62b7cd08 | 318 | { |
8768d548 | 319 | fprintf(fp, " %s: %s\n", eblock->text1, eblock->text2); |
62b7cd08 JH |
320 | count++; |
321 | eblock = eblock->next; | |
322 | } | |
4840604e TL |
323 | break; |
324 | #endif | |
325 | ||
059ec3d9 | 326 | default: |
8768d548 JH |
327 | fprintf(fp, "Subject: Mail failure\n\n"); |
328 | fprintf(fp, | |
62b7cd08 JH |
329 | "A message that you sent has caused the error routine to be entered with\n" |
330 | "an unknown error number (%d).\n", ident); | |
331 | break; | |
059ec3d9 PH |
332 | } |
333 | ||
715ab376 PH |
334 | /* Now, if configured, copy the message; first the headers and then the rest of |
335 | the input if available, up to the configured limit, if the option for including | |
336 | message bodies in bounces is set. */ | |
059ec3d9 | 337 | |
715ab376 | 338 | if (bounce_return_message) |
059ec3d9 | 339 | { |
715ab376 PH |
340 | if (bounce_return_body) |
341 | { | |
8768d548 | 342 | fprintf(fp, "\n" |
715ab376 PH |
343 | "------ This is a copy of your message, including all the headers."); |
344 | if (size_limit == 0 || size_limit > thismessage_size_limit) | |
345 | size_limit = thismessage_size_limit; | |
346 | if (size_limit > 0 && size_limit < message_size) | |
347 | { | |
348 | int x = size_limit; | |
349 | uschar *k = US""; | |
350 | if ((x & 1023) == 0) | |
351 | { | |
352 | k = US"K"; | |
353 | x >>= 10; | |
354 | } | |
8768d548 | 355 | fprintf(fp, "\n" |
715ab376 PH |
356 | "------ No more than %d%s characters of the body are included.\n\n", |
357 | x, k); | |
358 | } | |
8768d548 | 359 | else fprintf(fp, " ------\n\n"); |
715ab376 PH |
360 | } |
361 | else | |
059ec3d9 | 362 | { |
8768d548 | 363 | fprintf(fp, "\n" |
715ab376 PH |
364 | "------ This is a copy of the headers that were received before the " |
365 | "error\n was detected.\n\n"); | |
059ec3d9 | 366 | } |
059ec3d9 | 367 | |
715ab376 PH |
368 | /* If the error occurred before the Received: header was created, its text |
369 | field will still be NULL; just omit such a header line. */ | |
059ec3d9 | 370 | |
62b7cd08 | 371 | while (headers) |
715ab376 | 372 | { |
8768d548 | 373 | if (headers->text != NULL) fprintf(fp, "%s", CS headers->text); |
715ab376 PH |
374 | headers = headers->next; |
375 | } | |
059ec3d9 | 376 | |
715ab376 | 377 | if (ident != ERRMESS_VLONGHEADER && ident != ERRMESS_VLONGHDRLINE) |
8768d548 | 378 | fputc('\n', fp); |
059ec3d9 | 379 | |
715ab376 PH |
380 | /* After early detection of an error, the message file may be STDIN, |
381 | in which case we might have to terminate on a line containing just "." | |
382 | as well as on EOF. We may already have the first line in memory. */ | |
059ec3d9 | 383 | |
62b7cd08 | 384 | if (bounce_return_body && message_file) |
059ec3d9 | 385 | { |
8768d548 | 386 | BOOL enddot = f.dot_ends && message_file == stdin; |
f3ebb786 | 387 | uschar * buf = store_get(bounce_return_linesize_limit+2, TRUE); |
62b7cd08 | 388 | |
8768d548 | 389 | if (firstline) fprintf(fp, "%s", CS firstline); |
62b7cd08 | 390 | |
f2cb6292 | 391 | while (fgets(CS buf, bounce_return_linesize_limit+2, message_file)) |
059ec3d9 | 392 | { |
62b7cd08 JH |
393 | int len; |
394 | ||
395 | if (enddot && *buf == '.' && buf[1] == '\n') | |
396 | { | |
8768d548 | 397 | fputc('.', fp); |
62b7cd08 JH |
398 | break; |
399 | } | |
400 | ||
401 | len = Ustrlen(buf); | |
402 | if (buf[len-1] != '\n') | |
403 | { /* eat rest of partial line */ | |
404 | int ch; | |
405 | while ((ch = fgetc(message_file)) != EOF && ch != '\n') ; | |
406 | } | |
407 | ||
408 | if (size_limit > 0 && len > size_limit - written) | |
409 | { | |
410 | buf[size_limit - written] = '\0'; | |
8768d548 | 411 | fputs(CS buf, fp); |
62b7cd08 JH |
412 | break; |
413 | } | |
414 | ||
8768d548 | 415 | fputs(CS buf, fp); |
059ec3d9 PH |
416 | } |
417 | } | |
1a2e76e1 | 418 | #ifdef SUPPORT_DMARC |
4840604e TL |
419 | /* Overkill, but use exact test in case future code gets inserted */ |
420 | else if (bounce_return_body && message_file == NULL) | |
421 | { | |
62b7cd08 | 422 | /*XXX limit line length here? */ |
4840604e TL |
423 | /* This doesn't print newlines, disable until can parse and fix |
424 | * output to be legible. */ | |
8768d548 | 425 | fprintf(fp, "%s", expand_string(US"$message_body")); |
4840604e TL |
426 | } |
427 | #endif | |
059ec3d9 | 428 | } |
059ec3d9 PH |
429 | /* Close the file, which should send an EOF to the child process |
430 | that is receiving the message. Wait for it to finish, without a timeout. */ | |
431 | ||
8768d548 | 432 | (void)fclose(fp); |
059ec3d9 PH |
433 | status = child_close(pid, 0); /* Waits for child to close */ |
434 | if (status != 0) | |
435 | { | |
436 | uschar *msg = US"Child mail process returned status"; | |
437 | if (status == -257) | |
438 | log_write(0, LOG_MAIN, "%s %d: errno=%d: %s", msg, status, errno, | |
439 | strerror(errno)); | |
440 | else | |
441 | log_write(0, LOG_MAIN, "%s %d", msg, status); | |
442 | return FALSE; | |
443 | } | |
444 | ||
445 | return TRUE; | |
446 | } | |
447 | ||
448 | ||
449 | ||
450 | /************************************************* | |
451 | * Send message to sender * | |
452 | *************************************************/ | |
453 | ||
454 | /* This function is called when errors are detected during the receipt of a | |
455 | message. Delivery failures are handled separately in deliver.c. | |
456 | ||
457 | If there is a valid sender_address, and the failing message is not a local | |
458 | error message, then this function calls moan_send_message to send a message to | |
459 | that person. If the sender's address is null, then an error has occurred with a | |
460 | message that was generated by a mailer daemon. All we can do is to write | |
461 | information to log files. The same action is taken if local_error_message is | |
462 | set - this can happen for non null-senders in certain configurations where exim | |
463 | doesn't run setuid root. | |
464 | ||
465 | Arguments: | |
466 | ident identifies the particular error | |
467 | eblock chain of error_blocks containing data about the error | |
468 | headers message's headers (chain) | |
469 | message_file a FILE where the body of the message can be read | |
470 | check_sender if TRUE, read the first line of the file for a possible | |
471 | "From " sender (if a trusted caller) | |
472 | ||
473 | Returns: FALSE if there is no sender_address to send to; | |
474 | else the return from moan_send_message() | |
475 | */ | |
476 | ||
477 | BOOL | |
478 | moan_to_sender(int ident, error_block *eblock, header_line *headers, | |
479 | FILE *message_file, BOOL check_sender) | |
480 | { | |
481 | uschar *firstline = NULL; | |
482 | uschar *msg = US"Error while reading message with no usable sender address"; | |
483 | ||
62b7cd08 | 484 | if (message_reference) |
059ec3d9 PH |
485 | msg = string_sprintf("%s (R=%s)", msg, message_reference); |
486 | ||
487 | /* Find the sender from a From line if permitted and possible */ | |
488 | ||
8768d548 | 489 | if (check_sender && message_file && f.trusted_caller && |
059ec3d9 PH |
490 | Ufgets(big_buffer, BIG_BUFFER_SIZE, message_file) != NULL) |
491 | { | |
492 | uschar *new_sender = NULL; | |
493 | if (regex_match_and_setup(regex_From, big_buffer, 0, -1)) | |
494 | new_sender = expand_string(uucp_from_sender); | |
62b7cd08 | 495 | if (new_sender) sender_address = new_sender; |
059ec3d9 PH |
496 | else firstline = big_buffer; |
497 | } | |
498 | ||
499 | /* If viable sender address, send a message */ | |
500 | ||
8768d548 | 501 | if (sender_address && sender_address[0] && !f.local_error_message) |
059ec3d9 PH |
502 | return moan_send_message(sender_address, ident, eblock, headers, |
503 | message_file, firstline); | |
504 | ||
505 | /* Otherwise, we can only log */ | |
506 | ||
507 | switch(ident) | |
508 | { | |
509 | case ERRMESS_BADARGADDRESS: | |
510 | case ERRMESS_BADNOADDRESS: | |
511 | case ERRMESS_BADADDRESS: | |
512 | log_write(0, LOG_MAIN, "%s: at least one malformed recipient address: " | |
513 | "%s - %s", msg, eblock->text1, eblock->text2); | |
514 | break; | |
515 | ||
516 | case ERRMESS_IGADDRESS: | |
517 | case ERRMESS_NOADDRESS: | |
518 | log_write(0, LOG_MAIN, "%s: no recipient addresses", msg); | |
519 | break; | |
520 | ||
521 | /* This error has already been logged. */ | |
522 | case ERRMESS_IOERR: | |
523 | break; | |
524 | ||
525 | case ERRMESS_VLONGHEADER: | |
526 | log_write(0, LOG_MAIN, "%s: excessively long message header section read " | |
527 | "(more than %d characters)", msg, header_maxsize); | |
528 | break; | |
529 | ||
530 | case ERRMESS_VLONGHDRLINE: | |
531 | log_write(0, LOG_MAIN, "%s: excessively long message header line read " | |
532 | "(more than %d characters)", msg, header_line_maxsize); | |
533 | break; | |
534 | ||
535 | case ERRMESS_TOOBIG: | |
536 | log_write(0, LOG_MAIN, "%s: message too big (limit set to %d)", msg, | |
537 | thismessage_size_limit); | |
538 | break; | |
539 | ||
540 | case ERRMESS_TOOMANYRECIP: | |
541 | log_write(0, LOG_MAIN, "%s: too many recipients (max set to %d)", msg, | |
542 | recipients_max); | |
543 | break; | |
544 | ||
545 | case ERRMESS_LOCAL_SCAN: | |
546 | log_write(0, LOG_MAIN, "%s: rejected by local_scan: %s", msg, eblock->text1); | |
547 | break; | |
548 | ||
549 | case ERRMESS_LOCAL_ACL: | |
550 | log_write(0, LOG_MAIN, "%s: rejected by non-SMTP ACL: %s", msg, eblock->text1); | |
551 | break; | |
552 | ||
553 | default: | |
554 | log_write(0, LOG_MAIN|LOG_PANIC, "%s: unknown error number %d", msg, | |
555 | ident); | |
556 | break; | |
557 | } | |
558 | ||
559 | return FALSE; | |
560 | } | |
561 | ||
562 | ||
563 | ||
564 | /************************************************* | |
565 | * Send message to someone * | |
566 | *************************************************/ | |
567 | ||
568 | /* This is called when exim is configured to tell someone (often the | |
569 | mailmaster) about some incident. | |
570 | ||
571 | Arguments: | |
572 | who address to send mail to | |
573 | addr chain of deferred addresses whose details are to be included | |
574 | subject subject text for the message | |
575 | format a printf() format for the body of the message | |
576 | ... arguments for the format | |
577 | ||
578 | Returns: nothing | |
579 | */ | |
580 | ||
581 | void | |
1ba28e2b PP |
582 | moan_tell_someone(uschar *who, address_item *addr, |
583 | const uschar *subject, const char *format, ...) | |
059ec3d9 PH |
584 | { |
585 | FILE *f; | |
586 | va_list ap; | |
587 | int fd; | |
8e9fdd63 | 588 | int pid = child_open_exim(&fd, US"moan_tell_someone"); |
059ec3d9 PH |
589 | |
590 | if (pid < 0) | |
591 | { | |
592 | DEBUG(D_any) debug_printf("Failed to create child to send message: %s\n", | |
593 | strerror(errno)); | |
594 | return; | |
595 | } | |
596 | ||
597 | f = fdopen(fd, "wb"); | |
456682f5 | 598 | fprintf(f, "Auto-Submitted: auto-replied\n"); |
0e22dfd1 | 599 | moan_write_from(f); |
059ec3d9 | 600 | fprintf(f, "To: %s\n", who); |
d6c829b9 | 601 | moan_write_references(f, NULL); |
059ec3d9 PH |
602 | fprintf(f, "Subject: %s\n\n", subject); |
603 | va_start(ap, format); | |
604 | vfprintf(f, format, ap); | |
605 | va_end(ap); | |
606 | ||
d7978c0f | 607 | if (addr) |
059ec3d9 PH |
608 | { |
609 | fprintf(f, "\nThe following address(es) have yet to be delivered:\n"); | |
d7978c0f | 610 | for (; addr; addr = addr->next) |
059ec3d9 | 611 | { |
d7978c0f | 612 | uschar * parent = addr->parent ? addr->parent->address : NULL; |
059ec3d9 | 613 | fprintf(f, " %s", addr->address); |
d7978c0f | 614 | if (parent) fprintf(f, " <%s>", parent); |
059ec3d9 | 615 | if (addr->basic_errno > 0) fprintf(f, ": %s", strerror(addr->basic_errno)); |
d7978c0f | 616 | if (addr->message) fprintf(f, ": %s", addr->message); |
059ec3d9 PH |
617 | fprintf(f, "\n"); |
618 | } | |
619 | } | |
620 | ||
f1e894f3 | 621 | (void)fclose(f); |
059ec3d9 PH |
622 | child_close(pid, 0); /* Waits for child to close; no timeout */ |
623 | } | |
624 | ||
625 | ||
626 | ||
627 | /************************************************* | |
628 | * Handle SMTP batch error * | |
629 | *************************************************/ | |
630 | ||
631 | /* This is called when something goes wrong in batched (-bS) SMTP input. | |
632 | Information is written to stdout and/or stderr, and Exim exits with a non-zero | |
633 | completion code. BSMTP is almost always called by some other program, so it is | |
634 | up to that program to interpret the return code and do something with the error | |
635 | information, and also to preserve the batch input file for human analysis. | |
636 | ||
637 | Formerly, Exim used to attempt to continue after some errors, but this strategy | |
638 | has been abandoned as it can lead to loss of messages. | |
639 | ||
640 | Arguments: | |
641 | cmd_buffer the command causing the error, or NULL | |
642 | format a printf() format | |
643 | ... arguments for the format | |
644 | ||
645 | Returns: does not return; exits from the program | |
646 | exit code = 1 if some messages were accepted | |
647 | exit code = 2 if no messages were accepted | |
648 | */ | |
649 | ||
650 | void | |
1ba28e2b | 651 | moan_smtp_batch(uschar *cmd_buffer, const char *format, ...) |
059ec3d9 PH |
652 | { |
653 | va_list ap; | |
654 | int yield = (receive_messagecount > 0)? 1 : 2; | |
655 | ||
656 | DEBUG(D_any) debug_printf("Handling error in batched SMTP input\n"); | |
657 | ||
658 | /* On stdout, write stuff that a program could parse fairly easily. */ | |
659 | ||
660 | va_start(ap, format); | |
661 | vfprintf(stdout, format, ap); | |
662 | va_end(ap); | |
663 | ||
664 | fprintf(stdout, "\nTransaction started in line %d\n", | |
665 | bsmtp_transaction_linecount); | |
666 | fprintf(stdout, "Error detected in line %d\n", receive_linecount); | |
667 | if (cmd_buffer != NULL) fprintf(stdout, "%s\n", cmd_buffer); | |
668 | ||
669 | /* On stderr, write stuff for human consumption */ | |
670 | ||
671 | fprintf(stderr, | |
672 | "An error was detected while processing a file of BSMTP input.\n" | |
673 | "The error message was:\n\n "); | |
674 | ||
675 | va_start(ap, format); | |
676 | vfprintf(stderr, format, ap); | |
677 | va_end(ap); | |
678 | ||
679 | fprintf(stderr, | |
680 | "\n\nThe SMTP transaction started in line %d.\n" | |
681 | "The error was detected in line %d.\n", | |
682 | bsmtp_transaction_linecount, receive_linecount); | |
683 | ||
684 | if (cmd_buffer != NULL) | |
685 | { | |
686 | fprintf(stderr, "The SMTP command at fault was:\n\n %s\n\n", | |
687 | cmd_buffer); | |
688 | } | |
689 | ||
690 | fprintf(stderr, "%d previous message%s successfully processed.\n", | |
691 | receive_messagecount, (receive_messagecount == 1)? " was" : "s were"); | |
692 | ||
693 | fprintf(stderr, "The rest of the batch was abandoned.\n"); | |
694 | ||
81022793 | 695 | exim_exit(yield); |
059ec3d9 PH |
696 | } |
697 | ||
698 | ||
699 | ||
700 | ||
701 | /************************************************* | |
702 | * Check for error copies * | |
703 | *************************************************/ | |
704 | ||
705 | /* This function is passed the recipient of an error message, and must check | |
706 | the error_copies string to see whether there is an additional recipient list to | |
707 | which errors for this recipient must be bcc'd. The incoming recipient is always | |
708 | fully qualified. | |
709 | ||
710 | Argument: recipient address | |
711 | Returns: additional recipient list or NULL | |
712 | */ | |
713 | ||
714 | uschar * | |
715 | moan_check_errorcopy(uschar *recipient) | |
716 | { | |
717 | uschar *item, *localpart, *domain; | |
55414b25 | 718 | const uschar *listptr = errors_copy; |
059ec3d9 PH |
719 | uschar *yield = NULL; |
720 | uschar buffer[256]; | |
721 | int sep = 0; | |
722 | int llen; | |
723 | ||
724 | if (errors_copy == NULL) return NULL; | |
725 | ||
726 | /* Set up pointer to the local part and domain, and compute the | |
727 | length of the local part. */ | |
728 | ||
729 | localpart = recipient; | |
bc64a74d | 730 | domain = Ustrrchr(recipient, '@'); |
059ec3d9 PH |
731 | if (domain == NULL) return NULL; /* should not occur, but avoid crash */ |
732 | llen = domain++ - recipient; | |
733 | ||
734 | /* Scan through the configured items */ | |
735 | ||
d6c829b9 | 736 | while ((item = string_nextinlist(&listptr, &sep, buffer, sizeof(buffer)))) |
059ec3d9 | 737 | { |
55414b25 JH |
738 | const uschar *newaddress = item; |
739 | const uschar *pattern = string_dequote(&newaddress); | |
059ec3d9 PH |
740 | |
741 | /* If no new address found, just skip this item. */ | |
742 | ||
743 | while (isspace(*newaddress)) newaddress++; | |
744 | if (*newaddress == 0) continue; | |
745 | ||
746 | /* We now have an item to match as an address in item, and the additional | |
747 | address in newaddress. If the pattern matches, expand the new address string | |
748 | and return it. During expansion, make local part and domain available for | |
749 | insertion. This requires a copy to be made; we can't just temporarily | |
750 | terminate it, as the whole address is required for $0. */ | |
751 | ||
752 | if (match_address_list(recipient, TRUE, TRUE, &pattern, NULL, 0, UCHAR_MAX+1, | |
753 | NULL) == OK) | |
754 | { | |
ce9f225c | 755 | deliver_localpart = string_copyn(localpart, llen); |
059ec3d9 PH |
756 | deliver_domain = domain; |
757 | yield = expand_string_copy(newaddress); | |
758 | deliver_domain = deliver_localpart = NULL; | |
759 | if (yield == NULL) | |
760 | log_write(0, LOG_MAIN|LOG_PANIC, "Failed to expand %s when processing " | |
761 | "errors_copy: %s", newaddress, expand_string_message); | |
762 | break; | |
763 | } | |
764 | } | |
765 | ||
766 | DEBUG(D_any) debug_printf("errors_copy check returned %s\n", | |
767 | (yield == NULL)? US"NULL" : yield); | |
768 | ||
769 | expand_nmax = -1; | |
770 | return yield; | |
771 | } | |
772 | ||
773 | ||
774 | ||
775 | /************************************************ | |
776 | * Handle skipped syntax errors * | |
777 | ************************************************/ | |
778 | ||
779 | /* This function is called by the redirect router when it has skipped over one | |
780 | or more syntax errors in the list of addresses. If there is an address to mail | |
781 | to, send a message, and always write the information to the log. In the case of | |
782 | a filter file, a "syntax error" might actually be something else, such as the | |
783 | inability to open a log file. Thus, the wording of the error message is | |
784 | general. | |
785 | ||
786 | Arguments: | |
787 | rname the router name | |
788 | eblock chain of error blocks | |
789 | syntax_errors_to address to send mail to, or NULL | |
790 | some TRUE if some addresses were generated; FALSE if none were | |
791 | custom custom message text | |
792 | ||
793 | Returns: FALSE if string expansion failed; TRUE otherwise | |
794 | */ | |
795 | ||
796 | BOOL | |
797 | moan_skipped_syntax_errors(uschar *rname, error_block *eblock, | |
798 | uschar *syntax_errors_to, BOOL some, uschar *custom) | |
799 | { | |
800 | int pid, fd; | |
801 | uschar *s, *t; | |
802 | FILE *f; | |
059ec3d9 | 803 | |
d7978c0f | 804 | for (error_block * e = eblock; e; e = e->next) |
059ec3d9 PH |
805 | if (e->text2 != NULL) |
806 | log_write(0, LOG_MAIN, "%s router: skipped error: %s in \"%s\"", | |
807 | rname, e->text1, e->text2); | |
808 | else | |
809 | log_write(0, LOG_MAIN, "%s router: skipped error: %s", rname, | |
810 | e->text1); | |
059ec3d9 | 811 | |
d7978c0f | 812 | if (!syntax_errors_to) return TRUE; |
059ec3d9 | 813 | |
d7978c0f | 814 | if (!(s = expand_string(syntax_errors_to))) |
059ec3d9 PH |
815 | { |
816 | log_write(0, LOG_MAIN, "%s router failed to expand %s: %s", rname, | |
817 | syntax_errors_to, expand_string_message); | |
818 | return FALSE; | |
819 | } | |
820 | ||
821 | /* If we can't create a process to send the message, just forget about | |
822 | it. */ | |
823 | ||
8e9fdd63 | 824 | pid = child_open_exim(&fd, US"moan_skipped_syntax_errors"); |
059ec3d9 PH |
825 | |
826 | if (pid < 0) | |
827 | { | |
828 | DEBUG(D_any) debug_printf("Failed to create child to send message: %s\n", | |
829 | strerror(errno)); | |
830 | return TRUE; | |
831 | } | |
832 | ||
833 | f = fdopen(fd, "wb"); | |
456682f5 | 834 | fprintf(f, "Auto-Submitted: auto-replied\n"); |
0e22dfd1 | 835 | moan_write_from(f); |
059ec3d9 PH |
836 | fprintf(f, "To: %s\n", s); |
837 | fprintf(f, "Subject: error(s) in forwarding or filtering\n\n"); | |
d6c829b9 | 838 | moan_write_references(f, NULL); |
059ec3d9 | 839 | |
d7978c0f | 840 | if (custom) |
059ec3d9 | 841 | { |
d7978c0f | 842 | if (!(t = expand_string(custom))) |
059ec3d9 PH |
843 | { |
844 | log_write(0, LOG_MAIN, "%s router failed to expand %s: %s", rname, | |
845 | custom, expand_string_message); | |
846 | return FALSE; | |
847 | } | |
848 | fprintf(f, "%s\n\n", t); | |
849 | } | |
850 | ||
851 | fprintf(f, "The %s router encountered the following error(s):\n\n", | |
852 | rname); | |
853 | ||
d7978c0f | 854 | for (error_block * e = eblock; e; e = e->next) |
059ec3d9 PH |
855 | { |
856 | fprintf(f, " %s", e->text1); | |
857 | if (e->text2 != NULL) | |
858 | fprintf(f, " in the address\n \"%s\"", e->text2); | |
859 | fprintf(f, "\n\n"); | |
860 | } | |
861 | ||
862 | if (some) | |
863 | fprintf(f, "Other addresses were processed normally.\n"); | |
864 | else | |
865 | fprintf(f, "No valid addresses were generated.\n"); | |
866 | ||
f1e894f3 | 867 | (void)fclose(f); |
059ec3d9 PH |
868 | child_close(pid, 0); /* Waits for child to close; no timeout */ |
869 | ||
870 | return TRUE; | |
871 | } | |
872 | ||
873 | /* End of moan.c */ |